Cannot create new user from shvspy

[fvacek]

• fix edit user
• fix edit roles

[fvacek]

<T:RpcMessage,id:24,path:".broker/access/users",method:"setValue">i{params:["fanda",{"password":{"format":"SHA1","password":"998886fed1af5c356cff427eca4aa7bb53ee4d6c"},"roles":["tester"]}]}

<T:RpcMessage,id:24>i{error:i{1:8,2:"unknown variant `format`, expected `Plain` or `Sha1` at line 1 column 21"}}

[fvacek]

shoud be:
{ "password":{"Plain":"eyas3y45"}, "roles":["su"]}

[fvacek]

got:
{"password":{"format":"SHA1","password":"998886fed1af5c356cff427eca4aa7bb53ee4d6c"},"roles":["tester"]}