message: update sdk init doc
diff: @@ -18,7 +18,7 @@ import { User } from '../..';
  * \`\`\`javascript
  * import { AuthenticationClient } from "authing-js-sdk"
  * const authenticationClient = new AuthenticationClient({
  - * userPoolId: "YOUR_USERPOOL_ID",
  + * appId: "YOUR_APP_ID",
  * })
  * await authenticationClient.mfa.assosicateMfaAuthenticator({authenticatorType: 'totp'})
  * \`\`\`
  @@ -28,7 +28,7 @@ import { User } from '../..';
  * \`\`\`javascript
  * import { AuthenticationClient } from "authing-js-sdk"
  * const authenticationClient = new AuthenticationClient({
  - * userPoolId: "YOUR_USERPOOL_ID",
  + * appId: "YOUR_APP_ID",
  * })
  * await authenticationClient.mfa.verifyTotpMfa({totp: '112233', mfaToken: 'xxx'})
  * \`\`\`
  @@ -57,7 +57,7 @@ export class MfaAuthenticationClient {
  *
  * @example
  * const authenticationClient = new AuthenticationClient({
  - * userPoolId: "YOUR_USERPOOL_ID",
  + * appId: "YOUR_APP_ID",
  * })
  * const authenticators = await authenticationClient.mfa.getMfaAuthenticators({ type: 'totp' })
  *
  @@ -88,7 +88,7 @@ export class MfaAuthenticationClient {
  *
  * @example
  * const authenticationClient = new AuthenticationClient({
  - * userPoolId: "YOUR_USERPOOL_ID",
  + * appId: "YOUR_APP_ID",
  * })
  * const authenticators = await authenticationClient.mfa.assosicateMfaAuthenticator({ authenticatorType: 'totp' })
  *
  @@ -118,7 +118,7 @@ export class MfaAuthenticationClient {
  *
  * @example
  * const authenticationClient = new AuthenticationClient({
  - * userPoolId: "YOUR_USERPOOL_ID",
  + * appId: "YOUR_APP_ID",
  * })
  * const authenticators = await authenticationClient.mfa.deleteMfaAuthenticator()
  *
  @@ -144,7 +144,7 @@ export class MfaAuthenticationClient {
  *
  * @example
  * const authenticationClient = new AuthenticationClient({
  - * userPoolId: "YOUR_USERPOOL_ID",
  + * appId: "YOUR_APP_ID",
  * })
  * const authenticators = await authenticationClient.mfa.confirmAssosicateMfaAuthenticator({ authenticatorType: 'totp', totp: '112233' })
  *
  @@ -176,7 +176,7 @@ export class MfaAuthenticationClient {
  *
  * @example
  * const authenticationClient = new AuthenticationClient({
  - * userPoolId: "YOUR_USERPOOL_ID",
  + * appId: "YOUR_APP_ID",
  * })
  * const authenticators = await authenticationClient.mfa.verifyTotpMfa({ authenticatorType: 'totp', totp: '112233' })
  *
  @@ -208,7 +208,7 @@ export class MfaAuthenticationClient {
  *
  * @example
  * const authenticationClient = new AuthenticationClient({
  - * userPoolId: "YOUR_USERPOOL_ID",
  + * appId: "YOUR_APP_ID",
  * })
  * const authenticators = await authenticationClient.mfa.verifyTotpRecoveryCode({ authenticatorType: 'totp', totp: '112233' })
  *
  