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

Pass "Token 1e2226587bc1914fd970a408561269cfd4032726" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token 1e2226587bc1914fd970a408561269cfd4032726'