code: func usage() {
  	var buffer bytes.Buffer
  	// Crud operation
  	buffer.WriteString(` 
  
  	Simple password hasher. Since the user credentials 
  	can be stored in the config file, this utility helps 
  	to hash the password and store it as such. 
  
  	./password-hasher <password> <cost>
  
  	The cost value has to match the one in the config file.
  	Allowed interval is 4-31. Note that the high number
  	takes a lot of time to process.
  
  	Please do not use your bank account password. 
  	We didn't spend much time securing it.
  	`)
  
  	logrus.DefaultLogger().Print(buffer.String())
  }
docs: // Show info