Using two digits to display a number using TM1637 and a 4-digit display
Using tm1637.display(digit#, value); calls, you can display a two-digit number using division to isolate the tens digit and mod to isolate the units digit.  For example, if hour and mins have hour and minute values, respectively, consider code like:

tm1637.display(0, hour/10);
tm1637.display(1, hour%10);
tm1637.display(2, mins/10);
tm1637.display(3, mins%10);


Code like the above is suitable in cases where values don't exceed 99, and where displaying a leading zero is ok.

If you don't want to display the leading zero when hour is less than 10, add an if test and blank the first digit in that case.