Feat(auth): Rename authentication to auth (#6229)

**What**
- rename `authenticationModule` -> `authModule`

packages/auth/src/services/auth-provider.ts

@@ -0,0 +1,24 @@
+import { DAL } from "@medusajs/types"
+import { ModulesSdkUtils } from "@medusajs/utils"
+import { AuthProvider } from "@models"
+
+import { ServiceTypes } from "@types"
+
+type InjectedDependencies = {
+  authProviderRepository: DAL.RepositoryService
+}
+
+export default class AuthProviderService<
+  TEntity extends AuthProvider = AuthProvider
+> extends ModulesSdkUtils.abstractServiceFactory<
+  InjectedDependencies,
+  {
+    create: ServiceTypes.CreateAuthProviderDTO
+    update: ServiceTypes.UpdateAuthProviderDTO
+  }
+>(AuthProvider)<TEntity> {
+  constructor(container: InjectedDependencies) {
+    // @ts-ignore
+    super(...arguments)
+  }
+}