chore: fix GraphQLWithIAMIntegrationTests

Author: thisisabhash

AmplifyPlugins/API/Tests/APIHostApp/AWSAPIPluginGraphQLIAMTests/GraphQLWithIAMIntegrationTests.swift

@@ -18,6 +18,7 @@ class GraphQLWithIAMIntegrationTests: XCTestCase {
 
     let username = "integTest\(UUID().uuidString)"
     let password = "P123@\(UUID().uuidString)"
+    let email = UUID().uuidString + "@" + UUID().uuidString + ".com"
 
     override func setUp() async throws {
         do {
@@ -205,7 +206,9 @@ class GraphQLWithIAMIntegrationTests: XCTestCase {
     }
 
     func signUp() async throws {
-        let signUpResult = try await Amplify.Auth.signUp(username: username, password: password)
+        let userAttributes = [AuthUserAttribute(.email, value: email)]
+        let options = AuthSignUpRequest.Options(userAttributes: userAttributes)
+        let signUpResult = try await Amplify.Auth.signUp(username: username, password: password, options: options)
         guard signUpResult.isSignUpComplete else {
             XCTFail("Sign up successful but not complete: \(signUpResult)")
             return