What did I do wrong, the modid is vincentmod:
modLoader="javafml" #mandatory
# A version range to match for said mod loader - for regular FML @Mod it will be the minecraft version (without the 1.)
loaderVersion="[24,)" #mandatory
# A text field displayed in the mod UI
credits="vincent" #optional
# A text field displayed in the mod UI
authors="vincent" #optional
modId="vincentmod" #mandatory
# A list of mods - how many allowed here is determined by the individual mod loader
[[mods]] #mandatory
# The modid of the mod
modId="vincentmod" #mandatory
# The version number of the mod - there's a few well known ${} variables useable here or just hardcode it
version="${file.jarVersion}" #mandatory
# A display name for the mod
displayName="Testos" #mandatory
# The description text for the mod (multi line!) (#mandatory)
description='''
TestMod
'''
[[dependencies.examplemod]]
modId="minecraft"
mandatory=true
versionRange="[1.13]"
ordering="NONE"
side="BOTH"