diff --git a/backend/src/graphql/inputs/LoginUserInput.ts b/backend/src/graphql/inputs/LoginUserInput.ts
new file mode 100644
index 000000000..ee6fb1814
--- /dev/null
+++ b/backend/src/graphql/inputs/LoginUserInput.ts
@@ -0,0 +1,16 @@
+import { InputType, Field } from 'type-graphql'
+
+@InputType()
+export class LoginUserInput {
+  @Field({ nullable: true })
+  username?: string
+
+  @Field({ nullable: true })
+  email?: string
+
+  @Field({ nullable: true })
+  pubkey?: string
+
+  @Field()
+  password: string
+}