I’m sorry but I can’t configure the HTTP Request oauth2 node.
On postman I manage to generate the token with the grant type Password credentials and on n8n it proposes the Client credentials and I don’t know where to put the username and password and how to put it.
We don’t support the Password Grant type in n8n with the OAuth credential so you would need to manually implement the oauth process in a workflow. Does the API you are connecting to not offer another option for OAuth?
I don’t have full instructions for that but you would need to use http request nodes to make the same calls that the oauth type needs so it would be a bit like what you have in the http request node already but you would first need to call the authorize endpoint for your api then the token endpoint sending the header or body parameters it needs.