go - Using Environment Variables across files - GOPATH

Question

This is my first time coding in Go without using GOPATH.
I have a go.mod file.
I'm attempting to send an email through Sendgrid; I have a file which contains my SENDGRID_API_KEY called sendgrid.env.
When trying to use the key within my main.go file, the value isn't being pulled through.

fmt.Println(os.LookupEnv("SENDGRID_API_KEY")) // empty string 
fmt.Println(os.Getenv("SENDGRID_API_KEY")) // empty string

I've also used 'LookupEnv' which returns false.
Any help would be appreciated.

Answer 1

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