c# - Working with MongoLab from .NET - permissions problems -

i've open account on mongolab (free sandbox account testing). have code that's running on local mongodb server , running fine without problems.

in mongolab i've created database , created user database , placed connection string gave me in application:

 mongodb://<dbuser>:<dbpassword>@<my_id>.mlab.com:52408/<my_db> 

i tried this:

 mongodb://<dbuser>:<dbpassword>@<my_id>.mlab.com:52408/<my_db>?authmode=scram-sha1&rm.tcpnodelay=true 

in .net code i'm connecting database:

mongoclient client = new mongoclient(my_connection_string); imongodatabase database = client.getdatabase("mytestdb");  _versionrulescollection = database.getcollection<versionrule>("versionrules"); _versiondetailscollection = database.getcollection<versiondetails>("versiondetails"); 

but when try this:

_versiondetailscollection.indexes.createoneasync(builders<versiondetails>.indexkeys.ascending(x => x.productname).ascending(y => y.devicetype).ascending(z => z.versionname)) 

i exception saying

system.aggregateexception: 1 or more errors occurred. ---> mongodb.driver.mongocommandexception: command createindexes failed: not authorized on mytestdb execute command { createindexes: "versiondetails", indexes: [ { key: { productname: 1, devicetype: 1, versionname: 1 }, name: "productname_1_devicetype_1_versionname_1" } ] } 

even trying query got:

not authorized query on mytestdb .versiondetails 

i don't see way set permission users on portal. database created dynamically in app. , i'm @ lost here.

what doing wrong (it works on local machine)?