Flutter calling firebase cloud function admin.auth.updateUser - firebase

Question

EDIT**
Ok so I was able to get the parameters working thanks to first answer provided but now I have an issue whereby my function is creating a new user entirely in Firebase and not update an existing one, the uid that i am passing into the auth.admin.updateUser is teh uid of the existing user who's email i want to update. Here is the updated cloud function which is adding a new user rather than updating the existing:
exports.updateEmail = functions.https.onCall((data, context) => {
const email = data.email;
const uid = data.uid;
admin.auth().updateUser(uid, {
email: email
})
.then(function(userRecord) {
// See the UserRecord reference doc for the contents of userRecord.
console.log("Successfully updated user", userRecord.toJSON());
return response.status(200).json(userRecord.toJSON());
})
.catch(function(error) {
console.log("Error updating user:", error);
return response.status(404).json({
error: 'Something went wrong.'
});
});
});
I got the function from the firebase docs but it isn't doing what I intended it to do.
ORIGINAL POST**
I'm having some difficulty getting a cloud function to work when calling the function from within my flutter code. The issue that I am having is that the uid and email fields are undefined even though I am passing them through to the cloud function using busboy fields.
I'm trying to pass the email and uid field though to the function as follows:
final request = http.MultipartRequest('POST', Uri.parse('****************my function url************'));
request.fields['email'] = Uri.encodeComponent(newEmail);
request.fields['uid'] = Uri.encodeComponent(selectedUser.uid);
request.headers['Authorization'] = 'Bearer ${_authenticatedUser.token}';
final http.StreamedResponse streamedResponse = await request.send();
And on the Node.js side I am trying to use these fields using busboy, here is my cloud function in Node.js:
exports.changeEmail = functions.https.onRequest((request, response) => {
if (!request.headers.authorization ||
!request.headers.authorization.startsWith('Bearer ')
) {
return response.status(401).json({
error: 'Unauthorized.'
});
}
let idToken;
idToken = request.headers.authorization.split('Bearer ')[1];
let email;
let uid;
const busboy = new Busboy({
headers: request.headers
});
busboy.on('field', (fieldname, value) => {
if (fieldname == 'email') {
email = decodeURIComponent(value);
}
if (fieldname == 'uid') {
uid = decodeURIComponent(value);
}
});
admin.auth().updateUser(uid, {
email: email
})
.then(function(userRecord) {
// See the UserRecord reference doc for the contents of userRecord.
console.log("Successfully updated user", userRecord.toJSON());
return response.status(200).json(userRecord.toJSON());
})
.catch(function(error) {
console.log("Error updating user:", error);
return response.status(404).json({
error: 'Something went wrong.'
});
});
});
Even though I am passing the fields in with busboy fields they are not getting set in the function, is there something I am doing wrong here?

Answer 1

Why don't you use a callable function? It will automatically receive the authentication data.
The documentation even has examples on how to get the uid and email:
Declare the function:
exports.addMessage = functions.https.onCall((data, context) => {
// ...
});
Get the user properties from the context parameter:
// Message text passed from the client.
const text = data.text;
// Authentication / user information is automatically added to the request.
const uid = context.auth.uid;
const name = context.auth.token.name || null;
const picture = context.auth.token.picture || null;
const email = context.auth.token.email || null;
Call the function from your Flutter code:
Install cloud_functions package and then:
import 'package:cloud_functions/cloud_functions.dart';
await CloudFunctions.instance.call(functionName: 'addMessage');
If the user is authenticated before calling the function that's all you need to do.
You can also pass additional parameters to the function:
await CloudFunctions.instance.call(functionName: 'addMessage', parameters: {"email": "whatever#example.com"});
Any parameters will be passed to the data parameter on the function side.