Lucid evocation

I have learned that in a lucid dream you don’t have control over it, but I’ve read post were people talk about they called a demon in their lucid dream then it came. I just wanna know how that works, I know this kinda sounds like a dumb question but I really wanna evoke through lucid dreams

With a lucid dream or visions isn’t an actual calling but the deity sending a message to you in response to there ritual and his acceptance of there requests.

its exactly how those people said it was