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

Pass "Token d9dd8f324e6755840a930888c3012f19535bfdd5" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token d9dd8f324e6755840a930888c3012f19535bfdd5'