How to measure charging current for TP4056 module?
According to the datasheet, the proper way to measure charging current would be to put your multimeter probe at PIN 2 (the charge current monitor pin) of the TP4056 and measure the voltage. The current can then be determined using the formula below:

$$I_{bat} = \frac{V_{prog}}{R_{prog}} \times 1200$$

By default, the R_prog would be 1k2 ohm resistor and thus you would have a 1:1 relation between voltage and current. So if you measure 1V at PIN2, you have 1A of current charging the battery.