I'm using the flask-login library, and I haven't been able to find any good tutorials or documentation on how to go about allowing a user to reset their password through an email. What direction/resources can I look at on how to do this? A thorough google search didn't reveal anything useful.
flask-login doesn't take care of reset password emails and other such things. Its just there to manage sessions and cookies.
You should use Flask-Security which adds password reset functionality and other common security related features to flask. Flask-Security uses flask-login to handle sessions, but adds other features on top to round out the security features:
Email Confirmation
If desired you can require that new users confirm their email address. Flask-Security will send an email message to any new users with an confirmation link. Upon navigating to the confirmation link, the user will be automatically logged in. There is also view for resending a confirmation link to a given email if the user happens to try to use an expired token or has lost the previous email. Confirmation links can be configured to expire after a specified amount of time.
Password Reset/Recovery
Password reset and recovery is available for when a user forgets his or her password. Flask-Security sends an email to the user with a link to a view which they can reset their password. Once the password is reset they are automatically logged in and can use the new password from then on. Password reset links can be configured to expire after a specified amount of time.
User Registration
Flask-Security comes packaged with a basic user registration view. This view is very simple and new users need only supply an email address and their password. This view can be overrided[sic] if your registration process requires more fields.