snap package prints erroneous token config instructions

Reproduce the issue with the snap installation and the exercism download --exercise=hello-world --track=typescript command, then compare the displayed configure path with the working exercism configure --token=... command. Trace where the token error message is assembled and how the snap executable path is determined. Done means the guidance works for snap users without requiring a hard-coded /snap/exercism/5/exercism path.

I haven't used exercism for a while, but upon deciding to revisit after a hiatus, I was pleased to find there is now a snap package available. Following the instructions at

https://exercism.io/cli-walkthrough

> sudo snap install exercism

and then, admittedly, not completely following all the instructions, I jumped to trying to install an exercise, and got the following error message

> exercism download --exercise=hello-world --track=typescript
Error:

    Welcome to Exercism!

    To get started, you need to configure the tool with your API token.
    Find your token at

        https://exercism.io/my/settings

    Then run the configure command:

        /snap/exercism/5/exercism configure --token=YOUR_TOKEN

In copying the instructions and replacing with my token

/snap/exercism/5/exercism configure --token=<my_token>

and getting a positive confirmation message that it had worked correctly, I tried re-downloading the exercise

> exercism download --exercise=hello-world --track=typescript

only to receive the same error message. After a minor amount of debugging to determine the path of the actual exercism binary

> which exercism
/snap/bin/exercism

and using the updated path when running configure

/snap/bin/exercism configure --token=<my_token>

it worked. Ultimately, I stumbled upon the correct instruction on the third page of

https://exercism.io/cli-walkthrough

exercism configure --token=<my_token>

But it seems like the command

> exercism download --exercise=<exercise-name> --track=<language>

should output this instead of the /snap/exercism/5/exercism path.

I realize I probably should have RTFM and I don't know enough about snaps to know how hard it is to fix, but seems like a reasonable fix given it's a beginner tool and the much appreciated effort for creating the snap.