Hello! I am testing a method to auto-generate invoices. I have the following settings in my Web API request POST: https://api-m.sandbox.paypal.com/v2/oauth2/token Parameters: grant_type:client_credentials Authorization: Username: sb-*****_api1.business.example.com Password: <System generated password> Headers: Accept: application/json Accept-Language: en_US I continue to get the following error {"error":"invalid_client","error_description":"Client Authentication failed"} I am using the Sandbox credentials provided by Paypal. Confused on what I'm doing wrong. Any help is appreciated!
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