chore: rename according to API doc

Author: russellwheatley

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/Services/AuthService.swift

@@ -156,7 +156,7 @@ public final class AuthService {
     )
   }
 
-  public func signInWithProvider(_ provider: AuthProviderSwift) async throws {
+  public func signIn(_ provider: AuthProviderSwift) async throws {
     let credential = try await provider.createAuthCredential()
     try await signIn(credentials: credential)
   }

FirebaseSwiftUI/FirebaseFacebookSwiftUI/Sources/Views/SignInWithFacebookButton.swift

@@ -66,7 +66,7 @@ extension SignInWithFacebookButton: View {
       Task {
         do {
           let facebookProvider = FacebookProviderAuthUI(isLimitedLogin: limitedLogin)
-          try await authService.signInWithProvider(facebookProvider)
+          try await authService.signIn(facebookProvider)
         } catch {
           switch error {
           case FacebookProviderError.signInCancelled:

FirebaseSwiftUI/FirebaseGoogleSwiftUI/Sources/Views/SignInWithGoogleButton.swift

@@ -39,7 +39,7 @@ extension SignInWithGoogleButton: View {
   public var body: some View {
     GoogleSignInButton(viewModel: customViewModel) {
       Task {
-        try await authService.signInWithProvider(googleProvider)
+        try await authService.signIn(googleProvider)
       }
     }
   }

FirebaseSwiftUI/FirebasePhoneAuthSwiftUI/Sources/Views/PhoneAuthView.swift

@@ -87,7 +87,7 @@ extension PhoneAuthView: View {
                 verificationID: verificationID,
                 verificationCode: verificationCode
               )
-              try await authService.signInWithProvider(phoneProvider)
+              try await authService.signIn(phoneProvider)
             } catch {
               errorMessage = authService.string.localizedErrorMessage(for: error)
             }