You tried to run a command that doesn't allow the --token flag (like vercel switch). This is not allowed because commands like these are influencing the configuration files.
In turn, they would have to take the value of the --token flag into consideration (which is not a good idea, because flags in Vercel CLI should never change the configuration).
Specify a value for the --scope flag. This needs to be the slug or ID of the team as which you'd like to act (as an example, if your team URL is https://vercel.com/my-team, the value can be my-team) or the username or ID of a user you'd like to act as.