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It resolves the session, calls ",[464,634,469],{},", captures timing into ",[464,637,638],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[641,642,85],"h2",{"id":643},"options",[461,645,646,647,654],{},"Inherits all ",[648,649,651,653],"a",{"href":650},"\u002Flogging\u002Fbetter-auth\u002Fidentify-user#options",[464,652,469],{}," options",", plus:",[656,657,658,677],"table",{},[659,660,661],"thead",{},[662,663,664,668,671,674],"tr",{},[665,666,667],"th",{},"Option",[665,669,670],{},"Type",[665,672,673],{},"Default",[665,675,676],{},"Description",[678,679,680,701,720,739],"tbody",{},[662,681,682,688,693,698],{},[683,684,685],"td",{},[464,686,687],{},"exclude",[683,689,690],{},[464,691,692],{},"string[]",[683,694,695],{},[464,696,697],{},"['\u002Fapi\u002Fauth\u002F**']",[683,699,700],{},"Route patterns to skip (glob).",[662,702,703,708,712,717],{},[683,704,705],{},[464,706,707],{},"include",[683,709,710],{},[464,711,692],{},[683,713,714],{},[464,715,716],{},"undefined",[683,718,719],{},"If set, only matching routes are resolved.",[662,721,722,727,732,736],{},[683,723,724],{},[464,725,726],{},"onIdentify",[683,728,729],{},[464,730,731],{},"(log, session) => void",[683,733,734],{},[464,735,716],{},[683,737,738],{},"Called after successful identification.",[662,740,741,746,751,755],{},[683,742,743],{},[464,744,745],{},"onAnonymous",[683,747,748],{},[464,749,750],{},"(log) => void",[683,752,753],{},[464,754,716],{},[683,756,757],{},"Called when no session is found.",[641,759,761],{"id":760},"route-filtering","Route Filtering",[461,763,764],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[472,766,768],{"className":474,"code":767,"language":477,"meta":478,"style":478},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[464,769,770,786,795,810,823,837,844],{"__ignoreMap":478},[482,771,772,774,776,778,780,782,784],{"class":484,"line":485},[482,773,527],{"class":526},[482,775,530],{"class":496},[482,777,533],{"class":492},[482,779,497],{"class":536},[482,781,539],{"class":496},[482,783,542],{"class":492},[482,785,545],{"class":492},[482,787,788,790,792],{"class":484,"line":516},[482,789,552],{"class":551},[482,791,555],{"class":492},[482,793,794],{"class":496}," [\n",[482,796,797,800,802,804,806],{"class":484,"line":523},[482,798,799],{"class":492},"    '",[482,801,564],{"class":509},[482,803,561],{"class":492},[482,805,542],{"class":492},[482,807,809],{"class":808},"sHwdD","     \u002F\u002F Better Auth itself\n",[482,811,812,814,816,818,820],{"class":484,"line":548},[482,813,799],{"class":492},[482,815,573],{"class":509},[482,817,561],{"class":492},[482,819,542],{"class":492},[482,821,822],{"class":808},"   \u002F\u002F Public endpoints\n",[482,824,825,827,830,832,834],{"class":484,"line":584},[482,826,799],{"class":492},[482,828,829],{"class":509},"\u002Fapi\u002Fhealth",[482,831,561],{"class":492},[482,833,542],{"class":492},[482,835,836],{"class":808},"      \u002F\u002F Health checks\n",[482,838,839,842],{"class":484,"line":605},[482,840,841],{"class":496},"  ]",[482,843,581],{"class":492},[482,845,846,848],{"class":484,"line":619},[482,847,622],{"class":492},[482,849,625],{"class":496},[461,851,852],{},"For high-traffic apps, flip the model — only resolve sessions on routes that need them:",[472,854,856],{"className":474,"code":855,"language":477,"meta":478,"style":478},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[464,857,858,874,902],{"__ignoreMap":478},[482,859,860,862,864,866,868,870,872],{"class":484,"line":485},[482,861,527],{"class":526},[482,863,530],{"class":496},[482,865,533],{"class":492},[482,867,497],{"class":536},[482,869,539],{"class":496},[482,871,542],{"class":492},[482,873,545],{"class":492},[482,875,876,878,880,882,884,887,889,891,893,896,898,900],{"class":484,"line":516},[482,877,587],{"class":551},[482,879,555],{"class":492},[482,881,558],{"class":496},[482,883,561],{"class":492},[482,885,886],{"class":509},"\u002Fapi\u002Fdashboard\u002F**",[482,888,561],{"class":492},[482,890,542],{"class":492},[482,892,506],{"class":492},[482,894,895],{"class":509},"\u002Fapi\u002Faccount\u002F**",[482,897,561],{"class":492},[482,899,578],{"class":496},[482,901,581],{"class":492},[482,903,904,906],{"class":484,"line":523},[482,905,622],{"class":492},[482,907,625],{"class":496},[461,909,910,912,913,915,916,919,920,923,924,926,927,929],{},[464,911,707],{}," and ",[464,914,687],{}," use glob patterns (",[464,917,918],{},"*",", ",[464,921,922],{},"**","). Provide both if you need granular control — ",[464,925,687],{}," wins over ",[464,928,707],{},".",[641,931,933],{"id":932},"lifecycle-hooks","Lifecycle Hooks",[461,935,936,937,939],{},"Use ",[464,938,726],{}," to react to user identification — for example, force-keep logs for premium users via tail sampling:",[472,941,943],{"className":474,"code":942,"filename":476,"language":477,"meta":478,"style":478},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[464,944,945,961,988,1024,1051,1056,1061,1078,1103,1108],{"__ignoreMap":478},[482,946,947,949,951,953,955,957,959],{"class":484,"line":485},[482,948,527],{"class":526},[482,950,530],{"class":496},[482,952,533],{"class":492},[482,954,497],{"class":536},[482,956,539],{"class":496},[482,958,542],{"class":492},[482,960,545],{"class":492},[482,962,963,966,968,971,975,977,980,983,986],{"class":484,"line":516},[482,964,965],{"class":536},"  onIdentify",[482,967,555],{"class":492},[482,969,970],{"class":492}," (",[482,972,974],{"class":973},"sHdIc","log",[482,976,542],{"class":492},[482,978,979],{"class":973}," session",[482,981,982],{"class":492},")",[482,984,985],{"class":526}," =>",[482,987,545],{"class":492},[482,989,990,993,995,998,1000,1003,1005,1008,1011,1013,1016,1018,1021],{"class":484,"line":523},[482,991,992],{"class":488},"    if",[482,994,970],{"class":551},[482,996,997],{"class":496},"session",[482,999,929],{"class":492},[482,1001,1002],{"class":496},"user",[482,1004,929],{"class":492},[482,1006,1007],{"class":496},"plan",[482,1009,1010],{"class":492}," ===",[482,1012,506],{"class":492},[482,1014,1015],{"class":509},"enterprise",[482,1017,561],{"class":492},[482,1019,1020],{"class":551},") ",[482,1022,1023],{"class":492},"{\n",[482,1025,1026,1029,1031,1034,1037,1040,1043,1045,1047,1049],{"class":484,"line":548},[482,1027,1028],{"class":496},"      log",[482,1030,929],{"class":492},[482,1032,1033],{"class":536},"set",[482,1035,1036],{"class":551},"(",[482,1038,1039],{"class":492},"{",[482,1041,1042],{"class":551}," _forceKeep",[482,1044,555],{"class":492},[482,1046,614],{"class":613},[482,1048,500],{"class":492},[482,1050,625],{"class":551},[482,1052,1053],{"class":484,"line":584},[482,1054,1055],{"class":492},"    }\n",[482,1057,1058],{"class":484,"line":605},[482,1059,1060],{"class":492},"  },\n",[482,1062,1063,1066,1068,1070,1072,1074,1076],{"class":484,"line":619},[482,1064,1065],{"class":536},"  onAnonymous",[482,1067,555],{"class":492},[482,1069,970],{"class":492},[482,1071,974],{"class":973},[482,1073,982],{"class":492},[482,1075,985],{"class":526},[482,1077,545],{"class":492},[482,1079,1081,1084,1086,1088,1090,1092,1095,1097,1099,1101],{"class":484,"line":1080},8,[482,1082,1083],{"class":496},"    log",[482,1085,929],{"class":492},[482,1087,1033],{"class":536},[482,1089,1036],{"class":551},[482,1091,1039],{"class":492},[482,1093,1094],{"class":551}," anonymous",[482,1096,555],{"class":492},[482,1098,614],{"class":613},[482,1100,500],{"class":492},[482,1102,625],{"class":551},[482,1104,1106],{"class":484,"line":1105},9,[482,1107,1060],{"class":492},[482,1109,1111,1113],{"class":484,"line":1110},10,[482,1112,622],{"class":492},[482,1114,625],{"class":496},[461,1116,1117,1118,1120,1121,1123,1124,1126],{},"Hooks fire after the session is resolved and ",[464,1119,469],{}," has set its fields. They run on every request that passes the ",[464,1122,707],{},"\u002F",[464,1125,687],{}," filter, so keep them fast and side-effect-free.",[1128,1129,1130,1135],"tip",{},[461,1131,1132,1133,555],{},"Common patterns for ",[464,1134,726],{},[1136,1137,1138,1142,1145],"ul",{},[1139,1140,1141],"li",{},"Force-keep audit logs for admins or high-value plans.",[1139,1143,1144],{},"Tag the request with feature flags or tenant info loaded from the session.",[1139,1146,1147],{},"Increment a per-user counter for billing.",[641,1149,1151],{"id":1150},"error-handling","Error Handling",[461,1153,1154,1155,1158,1159,912,1161,1164],{},"The middleware catches every error from ",[464,1156,1157],{},"getSession"," and logs nothing — your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[464,1160,638],{},[464,1162,1163],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1166,1167,1168],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":478,"searchDepth":516,"depth":516,"links":1170},[1171,1172,1173,1174],{"id":643,"depth":516,"text":85},{"id":760,"depth":516,"text":761},{"id":932,"depth":516,"text":933},{"id":1150,"depth":516,"text":1151},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1178,1181],{"label":109,"icon":112,"to":110,"color":1179,"variant":1180},"neutral","subtle",{"label":123,"icon":126,"to":124,"color":1179,"variant":1180},{},{"title":114,"icon":117},{"title":456,"description":1175},"ZixjaO8WGr0DIrrPIzupQI4fZZLVn2bM3EBBAoqYgdg",[1187,1189],{"title":109,"path":110,"stem":111,"description":1188,"icon":112,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":119,"path":120,"stem":121,"description":1190,"icon":69,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1778340939018]