Let me explain further; in lighting conditions like that in the photo you need to use an external flash/speedlight, not the built in flash.
1. Position your subject so that their back is to the sun
2. Set you camera to an automated mode like Aperture priority and get an exposure reading. In bright sunlight I'd expect something like ISO 100, f/4, and 1/1600. (You can learn to estimate exposure by looking at the hardness of shadows and using the Sunny 16 Rule
)
3. Now set you camera to Manual Mode, and dial in the exposure settings you got earlier; then adjust them to underexpose by one stop. So if you got an exposure reading of f/4.0; 1/1600 one stop underexposure would be f/5.6 and 1/1600, or f/4.0 and 1/3200.
4. Turn on the external flash/speedlight which should be in ETTL mode, and take the photo and you'll get a it perfectly exposed photo.
Neil van Niekerk has several tutorials explaining how to do this: Taking photos in harsh sunlight