API Auth problem ASTPP 6.0 Community Edition

ASTPP Version (6) community edition (FreeSwitch)
Operating System: Debian 11

Hello, Installed OpenAPI addon today, have now been trying for hours without stop to get the api x-auth-token.

i keep getting this error over and over:“HTTP 403: {“status”:false,“error”:“Invalid authentication token found.”,“response_code”:403}”

i am sending like:
“{
“username”: “admin”,
“password”: “abc123”
}” in body and “Content-Type
application/json” in header. have tried many different endpoints like api/login etc but i keep getting same error no matter what i do. im a programmer, and have previously integrated and worked with alot of different API system, but this seem to be the less documented till now.

hope anybody can help me , Thanks in advance !