diff --git a/src/lib/server/api/common/types/oauth-user.ts b/src/lib/server/api/common/types/oauth.ts
similarity index 73%
rename from src/lib/server/api/common/types/oauth-user.ts
rename to src/lib/server/api/common/types/oauth.ts
index 9d14b0c..60e8bbd 100644
--- a/src/lib/server/api/common/types/oauth-user.ts
+++ b/src/lib/server/api/common/types/oauth.ts
@@ -6,4 +6,6 @@ export type OAuthUser = {
 	username: string;
 	email?: string;
 	email_verified?: boolean;
-}
\ No newline at end of file
+}
+
+export type OAuthProviders = 'github' | 'google' | 'apple'
\ No newline at end of file
diff --git a/src/lib/server/api/controllers/oauth.controller.ts b/src/lib/server/api/controllers/oauth.controller.ts
index ab8edb0..6a542d0 100644
--- a/src/lib/server/api/controllers/oauth.controller.ts
+++ b/src/lib/server/api/controllers/oauth.controller.ts
@@ -7,7 +7,7 @@ import { OAuth2RequestError } from 'arctic'
 import { getCookie, setCookie } from 'hono/cookie'
 import { TimeSpan } from 'oslo'
 import { inject, injectable } from 'tsyringe'
-import type {OAuthUser} from "$lib/server/api/common/types/oauth-user";
+import type {OAuthUser} from "$lib/server/api/common/types/oauth";
 
 @injectable()
 export class OAuthController extends Controller {
@@ -41,7 +41,7 @@ export class OAuthController extends Controller {
 					const oAuthUser: OAuthUser = {
 						sub: `${githubUser.id}`,
 						username: githubUser.login,
-						email: null
+						email: undefined
 					}
 
 					const userId = await this.oauthService.handleOAuthUser(oAuthUser, 'github')
diff --git a/src/lib/server/api/services/oauth.service.ts b/src/lib/server/api/services/oauth.service.ts
index 8dae4f9..ef563c6 100644
--- a/src/lib/server/api/services/oauth.service.ts
+++ b/src/lib/server/api/services/oauth.service.ts
@@ -1,7 +1,7 @@
 import { inject, injectable } from 'tsyringe'
 import { FederatedIdentityRepository } from '../repositories/federated_identity.repository'
 import { UsersService } from './users.service'
-import type {OAuthUser} from "$lib/server/api/common/types/oauth-user";
+import type {OAuthUser, OAuthProviders} from "$lib/server/api/common/types/oauth";
 
 @injectable()
 export class OAuthService {
@@ -10,7 +10,7 @@ export class OAuthService {
 		@inject(UsersService) private readonly usersService: UsersService,
 	) {}
 
-	async handleOAuthUser(oAuthUser: OAuthUser, oauthProvider: string) {
+	async handleOAuthUser(oAuthUser: OAuthUser, oauthProvider: OAuthProviders) {
 		const federatedUser = await this.federatedIdentityRepository.findOneByFederatedUserIdAndProvider(oAuthUser.sub, oauthProvider)
 
 		if (federatedUser) {
diff --git a/src/lib/server/api/services/users.service.ts b/src/lib/server/api/services/users.service.ts
index 8298793..172908f 100644
--- a/src/lib/server/api/services/users.service.ts
+++ b/src/lib/server/api/services/users.service.ts
@@ -10,7 +10,7 @@ import { type UpdateUser, UsersRepository } from '../repositories/users.reposito
 import { CollectionsService } from './collections.service'
 import { DrizzleService } from './drizzle.service'
 import { WishlistsService } from './wishlists.service'
-import type {OAuthUser} from "$lib/server/api/common/types/oauth-user";
+import type {OAuthUser} from "$lib/server/api/common/types/oauth";
 
 @injectable()
 export class UsersService {