Imports
- github.com/dgrijalva/jwt-go
- github.com/google/uuid
- github.com/joho/godotenv
- github.com/labstack/echo/v4
- github.com/sendgrid/sendgrid-go
- github.com/sendgrid/sendgrid-go/helpers/mail
- golang.org/x/oauth2
- golang.org/x/oauth2/google
- google.golang.org/api/calendar/v3