Animation issues

Hi guys,i created a character and his animation on Blender, then I export it to UE4 but the problem is when I hit play, I can move the character arround but he do the animation(A walk animation) continuously whitout even pressing the keys, if anyone know how to adjust the keys with the animation otherwise how to play the animation just by pressing keys help me, I’m using C++ by the way. Thank you .

https://docs.unrealengine.com/latest/INT/Engine/Animation/AnimBlueprints/index.html

https://docs.unrealengine.com/latest/INT/Engine/Animation/StateMachines/index.html