The proprietor of the domain can do this by welcoming you. The proprietor of a Realm can welcome another player by beginning Minecraft, at that point exploring to Minecraft Realms and tapping on the wrench symbol of their Realm. From here, select the choice that understands Players and welcome the player you need with their Minecraft username. You can check your welcomes by tapping on the envelope symbol at the top close to the Minecraft Realms logo. In the event that you have a forthcoming welcome, it will appear here for you to acknowledge.