[Auth] Update FinalizeMFAEnrollmentRequest to have only immutable properties

Author: ncooke3

FirebaseAuth/Sources/Swift/Backend/RPC/MultiFactor/Enroll/FinalizeMFAEnrollmentRequest.swift

@@ -27,33 +27,47 @@ class FinalizeMFAEnrollmentRequest: IdentityToolkitRequest, AuthRPCRequest {
 
   let displayName: String?
 
-  var phoneVerificationInfo: AuthProtoFinalizeMFAPhoneRequestInfo?
+  let phoneVerificationInfo: AuthProtoFinalizeMFAPhoneRequestInfo?
 
-  var totpVerificationInfo: AuthProtoFinalizeMFATOTPEnrollmentRequestInfo?
+  let totpVerificationInfo: AuthProtoFinalizeMFATOTPEnrollmentRequestInfo?
 
-  init(idToken: String?, displayName: String?,
-       phoneVerificationInfo: AuthProtoFinalizeMFAPhoneRequestInfo?,
-       requestConfiguration: AuthRequestConfiguration) {
-    self.idToken = idToken
-    self.displayName = displayName
-    self.phoneVerificationInfo = phoneVerificationInfo
-    super.init(
-      endpoint: kFinalizeMFAEnrollmentEndPoint,
-      requestConfiguration: requestConfiguration,
-      useIdentityPlatform: true
+  convenience init(idToken: String?, displayName: String?,
+                   phoneVerificationInfo: AuthProtoFinalizeMFAPhoneRequestInfo?,
+                   requestConfiguration: AuthRequestConfiguration) {
+    self.init(
+      idToken: idToken,
+      displayName: displayName,
+      phoneVerificationInfo: phoneVerificationInfo,
+      totpVerificationInfo: nil,
+      requestConfiguration: requestConfiguration
     )
   }
 
-  init(idToken: String?, displayName: String?,
-       totpVerificationInfo: AuthProtoFinalizeMFATOTPEnrollmentRequestInfo?,
-       requestConfiguration: AuthRequestConfiguration) {
+  convenience init(idToken: String?, displayName: String?,
+                   totpVerificationInfo: AuthProtoFinalizeMFATOTPEnrollmentRequestInfo?,
+                   requestConfiguration: AuthRequestConfiguration) {
+    self.init(
+      idToken: idToken,
+      displayName: displayName,
+      phoneVerificationInfo: nil,
+      totpVerificationInfo: totpVerificationInfo,
+      requestConfiguration: requestConfiguration
+    )
+  }
+
+  private init(idToken: String?, displayName: String?,
+               phoneVerificationInfo: AuthProtoFinalizeMFAPhoneRequestInfo?,
+               totpVerificationInfo: AuthProtoFinalizeMFATOTPEnrollmentRequestInfo?,
+               requestConfiguration: AuthRequestConfiguration) {
     self.idToken = idToken
     self.displayName = displayName
+    self.phoneVerificationInfo = phoneVerificationInfo
     self.totpVerificationInfo = totpVerificationInfo
     super.init(
       endpoint: kFinalizeMFAEnrollmentEndPoint,
       requestConfiguration: requestConfiguration,
-      useIdentityPlatform: true
+      useIdentityPlatform: true,
+      useStaging: false
     )
   }