"lawsg streams" runtime error

[caidingyu]

lawsg version 0.4.0 installed on Apple M2 Pro chip macOS 14.1.1 with brew.

Running lawsg streams <log_group> got below error:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x13f66ef]

goroutine 1 [running]:
github.com/mmcquillan/lawsg/fetch.getStreams(0x0, 0x0, 0x0, 0x0, 0x18bd5d4e060, 0x18bd5de0820, 0x0, 0x2710, 0x0, 0x0, ...)
	/Users/matt/code/lawsg/fetch/streams.go:63 +0x16f
github.com/mmcquillan/lawsg/fetch.Streams(0x0, 0x0, 0x0, 0x0, 0x18bd5d4e060, 0x18bd5de0820, 0x0, 0x2710, 0x0, 0x0, ...)
	/Users/matt/code/lawsg/fetch/streams.go:18 +0x55
main.main()
	/Users/matt/code/lawsg/lawsg.go:23 +0x371
       0

Notes:
Tested with my 3 different AWS accounts and only got the error on one, which has much larger number of log streams (6669) in the log group.
Another 2 accounts with smaller number of log streams (71 & 95) don't have the issue.