Please use JWT authentication if possible. More details in the online documentation.

Pass "Token 172fcaef71b94a619c5a354efb6a8f10cf11b005" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token 172fcaef71b94a619c5a354efb6a8f10cf11b005'