processing.algorithmHelp('native:mergevectorlayers')
input = iface.mapCanvas().layers()
processing.run('native:mergevectorlayers',{'LAYERS':input,'CRS':4326,'OUTPUT':'C:UsershpDesktopCOOPIGIS_DataCWW_Predictive_TargetingGEOREF_HH_GPS_DataShapefilesMergedTA_Mponda_GVH_Bolera_malunga.shp'})

Traceback (most recent call last):
  File "C:OSGEO4~1appsPython36libcode.py", line 64, in runsource
    code = self.compile(source, filename, symbol)
  File "C:OSGEO4~1appsPython36libcodeop.py", line 168, in __call__
    return _maybe_compile(self.compiler, source, filename, symbol)
  File "C:OSGEO4~1appsPython36libcodeop.py", line 99, in _maybe_compile
    raise err1
  File "C:OSGEO4~1appsPython36libcodeop.py", line 87, in _maybe_compile
    code1 = compiler(source + "n", filename, symbol)
  File "C:OSGEO4~1appsPython36libcodeop.py", line 133, in __call__
    codeob = compile(source, filename, symbol, self.flags, 1)
  File "<input>", line 1
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated UXXXXXXXX escape