Spigen USB-C Cable doesn't fit MacBook Pro (13", 2019)
The 2019 13" MacBook Pro has a completely standard Thunderbolt 3 port, which physically is the same form factor as USB-C. It's not a "charger plug" as such, but a generic port that supports power, data and alternate mode (display signal).

The Spigen cable has a USB-C plug in one end and a HDMI plug at the other end. It is the USB-C end of the cable that you're meant to plug into the MacBook Pro. If you cannot physically make it fit, contact the vendor that sold you the cable.

Spigen lists their cable as being USB-C, which means that it should in any case fit. In addition they specifically list the 2016 MacBook Pro and later versions as being compatible with their cable.