token with newline causes issues in creds file

[cprice404]

If you run momento configure --quick and paste bad token in w/ a newline at end. Then no matter what you do you cant overwrite the credential that was set in file. I ran into this earlier when had some bash command in clipboard instead of token so pasted the bash commands in for my token value on accident and then got stuck and had to rm my ~/.momento/credentials file to get unstuck. Even if you paste a valid token in then after there is no error so seems like it worked but then old bad value is still in the cred file?