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

Pass "Token 7f2300624dbf99a74dffd7b8480e81b71ad97c9e" in the Authorization header to use it

Example with curl:

curl -X GET https://wger.de/api/v2/routine/ \
     -H 'Authorization: Token 7f2300624dbf99a74dffd7b8480e81b71ad97c9e'