Step 1: Check IAM Permissions
Open an incognito window and navigate to: https://console.cloud.google.com and then log in with your Google Play developer credentials.
Select your project from the Project Picker.
Click the three dots in the top-right corner and select IAM & Permissions.
Alternatively, select your root organization from the Project Picker, then choose IAM from the left navigation bar.
Click Grant Access. A dialog box will appear.
Enter your email address in the Add Principals field.
Under Assign Roles, click the role field, search for Organization Policy Administrator, and select it.
Click Save.
Step 2: Enable Service Account Key Creation
Go to the Project Picker and select your project.
Use the Filter field to search for Key Creation.
Select the matching constraint from the results, such as "iam.disableServiceAccountKeyCreation."
Click Edit Policy and choose Override Parent Policy.
Click Add a Rule and set Enforcement to Off.
Click Set Policy to save the changes.
Step 3: Verify Key Creation
Return to the Service Account Generator and try creating a service account key.
Select the email associated with the service account.
Click "Keys" in the menu.
Select "Create New Key".
Choose "JSON", then click "Create".
Download the JSON file and upload it to your Subsplash Dashboard.
Step 4: Complete Your Google Developer Account Setup
Now that you've successfully created a service account key, continue setting up your Google Developer account.
Navigate to the "Invite Subsplash" section in the following article.
Start at Step 12 and follow the instructions until the end.
Navigate to the Google Set Up Article: CLICK HERE