Why is user information not available from firebase cloud database trigger? - node.js

Question

I have created a Firebase cloud function that will trigger on update of the data. When I go into Firebase console and change the node to either true or false, it triggers and I receive an email from my SendGrid set up. The problem is I am not able to obtain the users e-mail information.
I have spent over a week pouring over the documentation and it says I should be able to use context.auth, however, that is always "undefined" when printed out in console.
I have been trying to get the user data from the users actual info in Firebase as well as in /users/{uid}/email. I can't seem to figure out how to get the e-mail since the snapshot is in a different spot.
I need to somehow extract the users first name and email, which are in in:
/users/uid/first_name and /users/uid/email
I want those two things put into this function, so then I can tell SendGrid to use the email and name. The Sendgrid portion is working fine.
context.params.uid gives me the users firebase ID, but does nothing for me. I can't seem to use that to get the data I need
I tried authVar = context.auth and when I print it out it says 'undefined' and my function stops working.
exports.myFunctionPending =
functions.database.ref('/users/{uid}/profile/isPending')
.onUpdate(async (change, context) => {
const snapshot = change.after;
const val = snapshot.val();
const userid = context.params.uid; //shows userid but is useless
const authVar = context.auth; //says undefined and does nothing
console.log(val);
console.log(userid);
const msg = {
to: 'myemail#mydomain.com',
from: 'noreply#mydomain.com',
// custom templates
templateId: 'd-b7aakjsdgwq7d798wq7d8',
substitutionWrappers: ['{{', '}}'],
//substitutions: {
dynamic_template_data: {
//name: user.displayName
name: 'My Name'
}
};
try {
await sgMail.send(msg);
console.log('This was sucessful');
} catch(error) {
console.error('There was an error while sending the email:', error);
}
return null;
});

Answer 1

I had the code in the incorrect spot, I changed the logic and now it's working as intended.
exports.myFunction = functions.database.ref('/users/{uid}/user_area/pending')
.onUpdate(async (change, context) => {
const triggersnapshot = change.after;
const val = triggersnapshot.val();
const userid = context.params.uid;
console.log(val);
console.log(userid);
return admin.database().ref('users/' + userid).once('value').then(function (snapshot) {
var email = snapshot.child('email');
var name = snapshot.child('first_name');
console.log(snapshot.val());
console.log(email.val());
const msg = {
to: [email],
from: {
email: 'noreply#noreply.com',
name: 'No Name'
},
// custom templates
templateId: 'd-8347983274983u483242',
substitutionWrappers: ['{{', '}}'],
dynamic_template_data: {
name: name
}
};
return sgMail.send(msg);
});