This is so simple login request but cannot figure out why I am getting such error message when trying to login using Postman.

I use url http://localhost:8080/user/login?_format=json and input in the header Content-Type:application/json and I have in my body {"name":"user", "pass":"pass"} but I am getting this error message

{ "message": "The \"user\" parameter was not converted for the path \"/user/{user}\" (route name: \"rest.entity.user.GET\")" }

Using curl works though:

curl --header "Content-type: application/json" --request POST --data '{"name":"admin", "pass":"pass"}' http://localhost:8080/user/login?_format=json

curl result:


2 Answers 2


I have faced the same issue and resolved it by selecting "POST" method from dropdown list.

Find the below image:- enter image description here

OUTPUT:- { "current_user": { "uid": "1", "roles": [ "authenticated", "administrator" ], "name": "admin" }, "csrf_token": "XXXXXXXXXXXX", "logout_token": "XXXXXXXXXXX" }

Note: we can get this output for the first time, if we try for the second time we will get message like

{ "message": "This route can only be accessed by anonymous users." }

because postman works as a browser. To get it work for the second time we need to remove the cookie from postman.

Kindly let me know if I am wrong. Thanks..


This works for me (leave it on multiple lines):

$ curl --insecure \
  --header "Content-type: application/json" \
  --request POST "https://bo.mywebsite.com:8001/user/login?_format=json" \
  --data '{"name":"admin", "pass":"SuperSecret123&"}'

Note: --insecure is used to skip SSL verification.

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