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

Pass "Token 00e16133516a46ff1a2244292279c26d3ee5a63a" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token 00e16133516a46ff1a2244292279c26d3ee5a63a'