curl -X POST "https://api.tktchurch.com/v1/auth/link-provider" \
  -H "Authorization: Bearer eyJhbGciOiJIUzI1NiIs..." \
  -H "Content-Type: application/json" \
  -d '{
    "idToken": "eyJhbGciOiJSUzI1NiIs..."
  }'

const linkProvider = async (accessToken, idToken) => {
  const response = await fetch(
    'https://api.tktchurch.com/v1/auth/link-provider',
    {
      method: 'POST',
      headers: {
        'Authorization': `Bearer ${accessToken}`,
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({ idToken })
    }
  );

  if (!response.ok) {
    const error = await response.json();
    throw new Error(error.error.reason);
  }

  return response.status === 200;
};

// Usage
try {
  await linkProvider(
    'eyJhbGciOiJIUzI1NiIs...', // access token
    'eyJhbGciOiJSUzI1NiIs...'  // ID token from provider
  );
  console.log('Provider linked successfully');
} catch (error) {
  console.error('Failed to link provider:', error.message);
}

func linkProvider(accessToken: String, idToken: String) async throws {
    var urlRequest = URLRequest(url: URL(string: "https://api.tktchurch.com/v1/auth/link-provider")!)
    urlRequest.httpMethod = "POST"
    urlRequest.setValue("Bearer \(accessToken)", forHTTPHeaderField: "Authorization")
    urlRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
    
    let body = ["idToken": idToken]
    urlRequest.httpBody = try JSONEncoder().encode(body)
    
    let (_, response) = try await URLSession.shared.data(for: urlRequest)
    guard let httpResponse = response as? HTTPURLResponse else {
        throw URLError(.badServerResponse)
    }
    
    if httpResponse.statusCode != 200 {
        throw URLError(.badServerResponse)
    }
}

// Usage
do {
    try await linkProvider(
        accessToken: "eyJhbGciOiJIUzI1NiIs...",
        idToken: "eyJhbGciOiJSUzI1NiIs..."
    )
    print("Provider linked successfully")
} catch {
    print("Failed to link provider: \(error.localizedDescription)")
}

class UserService(private val client: OkHttpClient) {
    suspend fun linkProvider(accessToken: String, idToken: String) {
        val requestBody = """
            {
                "idToken": "$idToken"
            }
        """.trimIndent()

        val request = Request.Builder()
            .url("https://api.tktchurch.com/v1/auth/link-provider")
            .post(RequestBody.create(MediaType.parse("application/json"), requestBody))
            .header("Authorization", "Bearer $accessToken")
            .build()

        client.newCall(request).execute().use { response ->
            if (!response.isSuccessful) {
                val error = response.body?.string()?.fromJson<ErrorResponse>()
                throw Exception(error?.reason ?: "Failed to link provider")
            }
        }
    }
}

// Usage
try {
    userService.linkProvider(
        "eyJhbGciOiJIUzI1NiIs...", // access token
        "eyJhbGciOiJSUzI1NiIs..."  // ID token from provider
    )
    println("Provider linked successfully")
} catch (e: Exception) {
    println("Failed to link provider: ${e.message}")
}

import axios from 'axios';

const linkProvider = async (accessToken: string, idToken: string): Promise<void> => {
  try {
    await axios.post(
      'https://api.tktchurch.com/v1/auth/link-provider',
      { idToken },
      {
        headers: {
          'Authorization': `Bearer ${accessToken}`
        },
      }
    );
  } catch (error) {
    if (axios.isAxiosError(error)) {
      throw new Error(error.response?.data?.error?.reason || 'Failed to link provider');
    }
    throw error;
  }
};

// Usage
try {
  await linkProvider(
    'eyJhbGciOiJIUzI1NiIs...', // access token
    'eyJhbGciOiJSUzI1NiIs...'  // ID token from provider
  );
  console.log('Provider linked successfully');
} catch (error) {
  console.error('Failed to link provider:', error.message);
}

{
  "error": {
    "status": 400,
    "reason": "Email mismatch"
  }
}

{
  "error": {
    "status": 401,
    "reason": "Invalid or expired access token"
  }
}

{
  "error": {
    "status": 409,
    "reason": "Provider already linked to another account"
  }
}