code: public String generateVpnProfile(String resourceGroupName, String virtualNetworkGatewayName, VpnClientParameters parameters) {
          return generateVpnProfileWithServiceResponseAsync(resourceGroupName, virtualNetworkGatewayName, parameters).toBlocking().last().body();
      }
docs: Generates VPN profile for P2S client of the virtual network gateway in the specified resource group. Used for IKEV2 and radius based authentication.
  
  @param resourceGroupName The name of the resource group.
  @param virtualNetworkGatewayName The name of the virtual network gateway.
  @param parameters Parameters supplied to the generate virtual network gateway VPN client package operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the String object if successful.