Set visibility/access to sanctum tokens feature based on callback

[JeremyDunn]

I'd like to conditionally show/hide the sanctum token section on the my profile page based on the current user's permissions.
Maybe the enableSanctumTokens method's condition parameter could accept a callback or boolean?

[dangnhdev]

I also want to have this feature, where only users with an admin or dev role can generate tokens.