In three steps:
Adding the complete legal document acceptance scenario to your application is just two lines of HTML/JS code. Use the built-in consent form style or change any element you like with a custom CSS.
What is sufficient to accept the document? You can just click the ‘Accept’ button, check a box (for example ‘I accept the License Agreement’), type a line (for example ‘Read and understood’), or scroll the document till the end.
How to act where there’s a new version of the EULA? Sometimes it’s just fixing a typo that’s not worth running all existing users through reacceptance. In case of material changes you can have the users to re-accept the document or explicitly acknowledge the change.