How to see what pretendo account is on my 3ds

General
1

i am trying to figure out if i’m even logged in to the right account on pretendo on my 3ds if someone could help me with this that would be greatly appreciated

2

Va dans paramètres/indentifiant Nintendo network, puis ton compte s’affichera.

3

If you open up Miiverse, what happens?

Is there an error code? If so, what is the code?