code: public ServiceFuture<VpnProfileResponseInner> generateVpnProfileAsync(String resourceGroupName, String gatewayName, AuthenticationMethod authenticationMethod, final ServiceCallback<VpnProfileResponseInner> serviceCallback) {
          return ServiceFuture.fromResponse(generateVpnProfileWithServiceResponseAsync(resourceGroupName, gatewayName, authenticationMethod), serviceCallback);
      }
docs: Generates VPN profile for P2S client of the P2SVpnGateway in the specified resource group.
  
  @param resourceGroupName The name of the resource group.
  @param gatewayName The name of the P2SVpnGateway.
  @param authenticationMethod VPN client Authentication Method. Possible values are: 'EAPTLS' and 'EAPMSCHAPv2'. Possible values include: 'EAPTLS', 'EAPMSCHAPv2'
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object