Open Instagram and tap your profile icon at the bottom right. 2. Tap the three lines (hamburger icon) at the top right > Settings > Security. 3. Choose Login Activity to see a list of devices that have accessed your account. 4. If you spot any unfamiliar devices, use the Log Out option next to them. 5. If concerned about unauthorized access, change your password and consider enabling 'Two-Factor Authentication' for added security.