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

Pass "Token 5ab574b9a281aed7c45e09b6476fdceded41c3a9" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token 5ab574b9a281aed7c45e09b6476fdceded41c3a9'