pass-reset-part-1.js

//generate password reset hash
userSchema.methods.generatePasswordResetHash = function(){
    //create hash object, then create a sha512 hash of the user's current password 
    //and return hash
    const resetHash = crypto.createHash('sha512').update(this.password).digest('hex')
    return resetHash;
}

//verify password reset hash
userSchema.methods.verifyPasswordResetHash = function(resetHash = undefined){
    //regenerate hash and check if they are equal
    return this.passwordResetHash() === resetHash;
}