Allow to set a token from input (#1)

Reviewed-on: #1
Co-authored-by: Julien Fastré <julien.fastre@champs-libres.coop>
Co-committed-by: Julien Fastré <julien.fastre@champs-libres.coop>

main.go

@@ -69,8 +69,9 @@ func main() {
 		githubactions.Fatalf("could not get context: %v", err.Error())
 	}
 
-	token := os.Getenv("GITHUB_TOKEN")
+	token := githubactions.GetInput("token")
 	fmt.Printf("Api url is %v\n", ctx.ServerURL)
+	fmt.Printf("Debug: token length is %d characters\n", len(token))
 
 	config, err := ParseActionConfig(*ctx)
 	if err != nil {
@@ -125,7 +126,7 @@ func (a *Agent) ExistingOpenPullRequest(config CreatePrConfig) (bool, *gitea.Pul
 			gitea.ListPullRequestsOptions{State: gitea.StateOpen, ListOptions: gitea.ListOptions{Page: currentPage}})
 
 		if err != nil {
-			return false, nil, err
+			return false, nil, fmt.Errorf("error while listing all exisiting open pull requests: %v", err.Error())
 		}
 
 		for _, pull := range pulls {