To develop my own web application, I need a connection to the eBay API. for this I need the user tokens and the login into the sandbox environment. but I just can't log in or get the user tokens. I tried to register a new user for the sandbox environment. Unfortunately, I get the following error message. You can find these in the appendix.
When I click the button to log in to the sandbox environment, I also get an error message that my login details are not correct. (I used the normal developer login data)
When I try to create a sandbox user again, it says that the user is already registered, but I don't have any login data or anything like that. It simply does not work.
could you please help me how to solve this problem? That would be really great. Maybe someone of you has had the same problem before and maybe already knows the solution. It would really help me a lot because I have to finish the project as quickly as possible and the deadline is getting closer, but I have not yet been able to connect to the eBay API.