feat: get the logged in user info

client.go

@@ -205,7 +205,7 @@ func (c *Client) VerifyAccessToken(ctx context.Context, accessToken string) (*To
 	}
 
 	if !introspectionResponse.Active {
-		return nil, fmt.Errorf("the supplied access token is not valid")
+		return nil, fmt.Errorf("the supplied access token is invalid")
 	}
 
 	return introspectionResponse, nil

utils.go

@@ -0,0 +1,23 @@
+package authutils
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/savannahghi/firebasetools"
+)
+
+// GetLoggedInUserUID returns user information as part of OIDC protocol.
+func GetLoggedInUserUID(ctx context.Context) (string, error) {
+	val := ctx.Value(firebasetools.AuthTokenContextKey)
+	if val == nil {
+		return "", fmt.Errorf("unable to get auth token from context with key: %s", firebasetools.AuthTokenContextKey)
+	}
+
+	token, ok := val.(*TokenIntrospectionResponse)
+	if !ok {
+		return "", fmt.Errorf("wrong auth token type, got %v", token)
+	}
+
+	return token.Sub, nil
+}