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

src/app/(dashboard)/admin/users/_components/edit.user.form.tsx

@@ -45,7 +45,6 @@ export default function EditUserForm({
     defaultValues: {
       id: user.id,
       name: user.name,
-      username: user.username,
       email: user.email,
       role: user.role,
       isActive: user.isActive,
@@ -84,13 +83,6 @@ export default function EditUserForm({
         placeholder={formCopy.namePlaceholder}
         register={register("name")}
       />
-      <UserTextInput
-        error={errors.username?.message}
-        id="username"
-        label={formCopy.usernameLabel}
-        placeholder={formCopy.usernamePlaceholder}
-        register={register("username")}
-      />
       <UserTextInput
         error={errors.email?.message}
         id="email"

src/app/(dashboard)/admin/users/_components/new.user.form.tsx

@@ -76,13 +76,6 @@ export default function NewUserForm({
         placeholder={formCopy.namePlaceholder}
         register={register("name")}
       />
-      <UserTextInput
-        error={errors.username?.message}
-        id="username"
-        label={formCopy.usernameLabel}
-        placeholder={formCopy.usernamePlaceholder}
-        register={register("username")}
-      />
       <UserTextInput
         error={errors.email?.message}
         id="email"

src/app/(dashboard)/admin/users/page.tsx

@@ -55,9 +55,6 @@ export default async function UsersPage(props: {
                 <th scope="col" className="p-4">
                   {copy.list.columns.name}
                 </th>
-                <th scope="col" className="p-4">
-                  {copy.list.columns.username}
-                </th>
                 <th scope="col" className="p-4">
                   {copy.list.columns.email}
                 </th>
@@ -76,7 +73,6 @@ export default async function UsersPage(props: {
               {users.map((user) => (
                 <tr key={user.id} className="border-b">
                   <td className="p-4">{user.name}</td>
-                  <td className="p-4">{user.username}</td>
                   <td className="p-4">{user.email}</td>
                   <td className="p-4">
                     {formatUserRole(