Add excel table to existing calculated data

[sitalc]

hi, i have a powerbi report that connects different data sources and gives an output table based on multiple measures. to this final table, how can i append a new table from excel - with matching columns/similar data. i have a user who is not in the sytem so i need to add their data to this powerbi from outside as a manual hack so that the user still shows up in the final report. 

thank you