Get to "Solna" / "Solna station" 

and the On-Inn Basic bar & kök on Råsundavägen 37 that is closest to Stockholm City

id est the south exit from the Pendeltåg  (https://api.sl.se/fordonspositioner#PT )

at "Solna" / "Solna station" and the north exit from Tvärbanan ( https://api.sl.se/fordonspositioner#TVB )

at "Solna station" ...

You may want look at these (1-4):

1) Resrobot ( "B" "Stop / Address / Point of interest" "Solna station" )

https://reseplanerare.resrobot.se/index.html#!P|TP!histId|0!histKey|H63231

and/or

2) Traffic information on Pendeltåg / Tvärbanan ( that goes to  "Solna" / "Solna station" ):

https://api.sl.se/fordonspositioner#PT

https://api.sl.se/fordonspositioner#TVB

(that also has information on "Roslagsbanan" / "Saltsjöbanan" / "Lidingöbanan" / "Linje 7" / "Gröna linjen" / "Röda linjen" and "Blå linjen)

and/or

3) Departures from Solna ( "Solna" )

https://www.trafikverket.se/trafikinformation/tag/?TrainOrStation=Solna&ArrDep=departure

and/or

4) Arrivals to Solna ( "Solna" )

https://www.trafikverket.se/trafikinformation/tag/?TrainOrStation=Solna&ArrDep=arrival

OnOn from the hares Sprintosaurus ( 0760-815247 , ) and Nordic Semen