refactor: remove username from User model, login by email only

src/use-cases/user.use-cases.ts

@@ -11,7 +11,6 @@ import {
   createUser,
   getUserByEmail,
   getUserById,
-  getUserByUsername,
   resetUserPassword,
   setUserActive,
   updateUser,
@@ -49,15 +48,11 @@ function uniqueErrorFor(error: unknown): FieldErrors | null {
 
   const target = Array.isArray(error.meta?.target) ? error.meta.target : []
 
-  if (target.includes("username")) {
-    return { username: ["Username already exists"] }
-  }
-
   if (target.includes("email")) {
     return { email: ["Email already exists"] }
   }
 
-  return { username: ["Username already exists"] }
+  return { email: ["Email already exists"] }
 }
 
 function isTransactionConflictError(error: unknown) {
@@ -113,14 +108,10 @@ async function getAdminAccessLossError(
 export async function createUserUseCase(
   input: CreateUserFormType,
 ): Promise<UserUseCaseResult> {
-  const { username, email } = input
+  const { email } = input
 
   try {
     return await prisma.$transaction(async (tx) => {
-      if (await getUserByUsername(username, tx)) {
-        return userError({ username: ["Username already exists"] })
-      }
-
       if (await getUserByEmail(email, tx)) {
         return userError({ email: ["Email already exists"] })
       }
@@ -145,7 +136,7 @@ export async function createUserUseCase(
 export async function updateUserUseCase(
   input: UpdateUserFormType & ActorInput,
 ): Promise<UserUseCaseResult> {
-  const { actorId, id, username, email, role, isActive, ...data } = input
+  const { actorId, id, email, role, isActive, ...data } = input
 
   try {
     return await runSerializableUserTransaction(async (tx) => {
@@ -166,17 +157,12 @@ export async function updateUserUseCase(
         if (error) return userError({ id: [error] })
       }
 
-      const existingUsername = await getUserByUsername(username, tx)
-      if (existingUsername && existingUsername.id !== id) {
-        return userError({ username: ["Username already exists"] })
-      }
-
       const existingEmail = await getUserByEmail(email, tx)
       if (existingEmail && existingEmail.id !== id) {
         return userError({ email: ["Email already exists"] })
       }
 
-      await updateUser(id, { ...data, username, email, role, isActive }, tx)
+      await updateUser(id, { ...data, email, role, isActive }, tx)
 
       return {
         success: true,