"We require you" is correct and usable in written English.
You can use it when you want to express a need or demand from someone. For example, "We require you to submit a project proposal by the end of the week."
"You can imagine a scenario in the future, when you're applying for a job, and the employer says, 'Sure, you've got the talent for this, but we require you to take Adderall.' Now, maybe you do start to care about the ethical implications".
In cases where Twitter content is the basis (in whole or in part) of the advertising sale, we require you to compensate us (recoupable against any fees payable to Twitter for data licensing).
If it wants to maintain its relationship with the hacker community though, Perhaps its disclosure policy could use stronger language than "we encourage you to let us know right away", such as "we require you".
"People love solar, but we required you to own a roof" and that it face a certain way, said Mr. Burke.
"In the past we required you to know too much about what was wrong to get help," says Sullivan.
Should you disappoint us again, we will require you to display an Act of Loyalty.
A: We only require you to use the app if you want to use it.
This is one of the few contests in which we'll require you to take a picture, so just suck it up and whip out the cameraphone.
Of course, when you read "we will require you to work with us directly" or "there may also be additional changes to the Rules of the Road" in Michael Sippey's "Changes coming in Version 1.1 of the Twitter API" post, it does not look promising for developers.
We will require you to get treatment.
We'll require you to sign up for insurance, but only until you back out.
