User prompt to select metric (field key) in a dashboard

Hello. I am using the latest version of Grafana SSO and Influxdb as my database.

I have an Influxdb measure that contains a timestamp and multiple fields, each one being the value of a different metric: temperature, pressure, flow rate, etc.

timestamp temperature pressure flow …etc
2021-06-24 08:22:30 70 13,2 7 …

I want to create a prompt in the dashboard to provide the users to choose the metric they want to plot in a dashboard. Since I am working with Influxdb, I was able to get the metric names and place them in a variable by performig the following query:

import “influxdata/influxdb/schema” schema.tagKeys(bucket: “myBucket”)

So now the users can select any metric in a prompt.
But now I do not know how to filter the query in Grafana to plot only the metric chosen by the user… Do any of you know how to do this?

Thanks in advance!