unauthorized_client when trying to authenticate via API for Bitbucket Cloud

[Maximilian Schmitt]

I'm trying to use the Bitbucket API but I can't seem to authenticate. I'm using the sample cURL snippet that is displayed in the docs for 3. Resource Owner Password Credentials Grant (4.3).

I'm replacing username with my email address and password with my password like this:

curl -X POST -u "client_id:secret" https://bitbucket.org/site/oauth2/access_token -d grant_type=password -d username=email@provider.com -d password=my5password1

The response I get back is always:

{"error_description": "Invalid OAuth client credentials", "error": "unauthorized_client"}

I'm not sure what is going wrong. I've tried changing my password and using my username instead of my email address. I don't have two-step-verification enabled.

What else can I do to verify that my settings are correct?

Thanks a lot for your help! :)

[Maximilian Schmitt · Accepted solution]

I had to add an OAuth consumer in my account settings and replace "client_id:secret" with the information frmo the OAuth consumer.