Finish server-side translations in controllers

locale/en_US/api.locale.js

@@ -6,6 +6,20 @@ module.exports = exports = {
     group_already_exists: 'A group with that name already exists.',
 
     user_not_found: 'User not found with that ID.',
+    user_already_exists: 'A user with that identifier already exists.',
+
+    client_not_found: 'Client not found with that ID.',
+    nonexistent_client: '(Non-existent Client)',
+
+    token_not_found: 'Token not found with that ID, or the token has expired.',
+
+    provider_already_exists: 'A service provider with that entity_id already exists.',
+
+    setting_not_found: 'No such setting exists with that key.',
+
+    banner_not_found: 'Banner message not found with that ID.',
+
+    app_pw_not_found: 'App password not found with that UUID.',
 
     invalid_ldap_client_id: 'Invalid ldap_client_id:',
     invalid_oauth_client_id: 'Invalid oauth_client_id:',
@@ -18,6 +32,9 @@ module.exports = exports = {
     },
     improper_field: 'Improperly formatted field:',
     alphanum_underscores: '(alphanumeric/underscores)',
+    array: '(array)',
+    email: '(email)',
+    absolute_url: '(should be absolute URL)',
     provide_one: 'Please provide one of:',
     must_one: 'Must be one of:',
 }