refactor(client): Simplify createSessionAsync
refactor(client): Simplify createSessionAsync

open62541/open62541,JGrothoff/open62541,jpfr/open62541,jpfr/open62541,JGrothoff/open62541,open62541/open62541,open62541/open62541,jpfr/open62541,JGrothoff/open62541,jpfr/open62541,JGrothoff/open62541,open62541/open62541