R code for getting miRNAs from miRTarBase and TargetScan by gene list

Question

[mastoreh]

i have a gene list with like 500 genes that i want to get each related miRNAs for each one but i have a problem, in miRTarBase and TargetScan sites, i can upload just one gene in there and if i enter my genes one by one, it has many time i need R code that it use miRTarBase and TargetScan sites that give my gene list and return it with all miRNAs for each gene also it show me adjust p value of them that i can filter them with it