i am using STM32F103R series mcu but here usb is not getting detect can aybody help on this?

Hii team i am working with STM32F103RET6 mcu and i want to read the ADC value in DMA mode of multi channel and send these value to the PC using USB. but i am getting stuck in MX_ADC1_Init(). if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK){Erro...