fix: allow metadata in update organization request (#700)

packages/better-auth/src/plugins/organization/adapter.ts

@@ -237,7 +237,10 @@ export const getOrgAdapter = (
 						value: organizationId,
 					},
 				],
-				update: data,
+				update: {
+					...data,
+					metadata: data.metadata ? JSON.stringify(data.metadata) : undefined,
+				},
 			});
 			return organization;
 		},

packages/better-auth/src/plugins/organization/routes/crud-org.ts

@@ -140,6 +140,11 @@ export const updateOrganization = createAuthEndpoint(
 							description: "The logo of the organization",
 						})
 						.optional(),
+					metadata: z
+						.record(z.string(), z.any(), {
+							description: "The metadata of the organization",
+						})
+						.optional(),
 				})
 				.partial(),
 			organizationId: z.string().optional(),