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My application crashes at the moment that there is already a user logged in. I am thinking about not using an observer and just using this as a trigger. How would I go about this? 
To add onto this, I am also using the HHShredder logging tool. I can only see the logging occur when the application crashes. I have no idea how I can trigger the logging on user logon. Is this possible? 
A:
Code only to check if there is a user logged in, or not, and only then run your code.
$user = User::getUserByEmail($email);
if($user->isActive()) {
  // Perform your action here, if no user is logged in
}
You can always override any default behaviour in the core class.
sales team,” I told her. “They were on an aggressive sales team, but they’d been trained.”
“And the training in that particular case?” she asked.
“Well,” I said, “before they came into the office, they had this weird sales training thing they did. They’d come into the office, and they’d ask what this button does, and they’d push it, and then they’d say what does that button do, and they’d push it, and so on and so forth.”
“That’s weird,” she said. “Why do they do that?”
I thought about that for a while. “I don’t know,” I told her. “But it does have an effect. They learned how to sell, but not how to sell to someone they didn’t know.”
She looked at me. “When you said they’d been trained, I didn’t think you meant it the way you just said it,” she told me.
“What do you mean?” I asked.
“I mean that you weren’t training them on what to say to the person who would be buying,” she said. “You were training them to pretend that what they were selling was something that it really wasn’t.”
“Yes, I guess 3125841983
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